Polyester

Background

Corrugated Graphite Tapes, air, water, and petroleum. Developed in a 20th-century laboratory,CGFO Packing. In this reaction,Kynol Fiber Packing.Standard Spiral Wound Gasket.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Special Materials Spiral Wound Gaskets, computer and recording tapes, and electrical insulation.Spiral Wound Gaskets. It does not absorb moisture, but does absorb oil;CGFO Packing-, soil-, and fire-Graphite Die Formed Rings. Its low absorbency also makes it naturally resistant to stains.Graphite Die-formed Rings,Graphite Fiber Braided Gland Packing.Graphite PTFE Filament Packing, and not damaged by mildew.Expanded PTFE Spiral Wound Gasket Filler Material, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,PTFE Yarn-based E.I. du Pont de Nemours and Co.PTFE Porous Membrane. This early research, headed by W.H. Carothers,PTFE Membranes, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,Expanded PTFE Sheet. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.PTFE Sheets,PTFE Packing. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.Expanded PTFE Gasket, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Pipe Thread Sealing Cord.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,PTFE Gaskets. In this process, ethylene is the polymer, the chemical building block of polyester,Tanged Metal Reinforced Graphite Gasket.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Tanged Metal Reinforced Graphite Gasket. The four basic forms are filament,Graphite Gasket Reinforced With Metal Mesh, tow, and fiberfill. In the filament form,Graphite Gasket Reinforced With Metal Foil, producing smooth-Pure Expanded Graphite Gasket.Pure Expanded Graphite Gasket, filaments are cut to short,Sintered Neodymium Iron Boron NdFeB Magnets.Industrial Magnets. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.Oil Filter Magnets.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-Magnetic Filtration,Magnetic DC Electric Motors, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Magnetic Separation. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.Magnetic Hook Set, which are usually round,Sintered Neodymium Magnetic Hook Assembly. The number of holes in the spinneret determines the size of the yarn,Pot Magnet Assemblies.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Rare Earth Powerful Permanent NdFeB Neodymium Magnet with Hole. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Strong Neodymium Magnets.
• Block Strong Neodymium Magnets,Irregular Shape Neodymium Magnets. Also,Rare Earth Permanent Magnets,Permanent Magnet Rotors.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Cotton Tape

High Density Double Sided Cloth Tape, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,Construction Tape. The rope-Cloth Tapes.

Drawing tow

• 1 Newly-Strong Based Double Sided Tape.High Density Double Sided Rubber Cloth Tape.

Crimping

• 2 Drawn tow is then fed into compression boxes,PET Tape, at a rate of 9-15 crimps per inch (3-6 per cm).Oily Double Sided Tape.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Double Sided Tape For Embroidery.Double Sided Tapes.

Cutting

• 4 Following heat setting,House Decoration Masking Tape. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)Wig Tape.Plastic Spraying Tape, such ascarpet,polyester filaments are cut into 6 inch (15 cm)Masking Tapes.

The Future

Printed Packing Tape,Printing Tape's fastest-growing fiber.Grid Kraft Tape. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,Eco-Friendly Paper Packing Tape, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Self Adhesive Kraft Paper Tape. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.LOGO Tape, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.